A given controller

ShareByEmailController.php

<?php

namespace App\Http\Controllers\Podcast;

use App\Podcast;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use Illuminate\Support\Facades\Lang;
use App\Http\Helpers\ThrottlesRequests;
use Illuminate\Validation\ValidationException;
use App\Notifications\Podcast\EmailShareNotification;
use Illuminate\Support\Facades\Notification;

class ShareByEmailController extends Controller
{
    use ThrottlesRequests;

    /**
     * Attempts per cycle
     *
     * @var int
     */
    protected $maxAttempts = 5;

    /**
     * Decay minutes for throttling
     *
     * @var int
     */
    protected $decayMinutes = 10;

    /**
     * Create a new ShareByEmail instance
     *
     * @return void
     */
    public function __construct()
    {
        $this->middleware('auth');
    }

    /**
     * Shares the Podcast to a given email
     *
     * @param  \App\Podcast $podcast
     * @param  \Illuminate\Http\Request $request
     * @return \Illuminate\Http\RedirectResponse
     * @throws \Illuminate\Validation\ValidationException
     */
    public function __invoke(Podcast $podcast, Request $request)
    {
        $this->checkThrottling($request);

        $request->validate([
            'email' => 'required|email',
        ]);

        Notification::route('mail', $request->only('email'))
            ->notify(new EmailShareNotification($request->user(), $podcast));

        $this->incrementAttempts($request);

        session()->flash('alert', trans('podcast.shared_email'));

        return redirect()->back();
    }
}